couch



UNITED STATES PATENT OFFICE.

J. HOWARD BOWEN, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO ALBERT G. COUCH, OF BOSTON, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 273,017, dated February 27, 1883.

Application filed January 9, 1883. (No model.)

To all whom it may concern: 0

Be it known that I, JAMES H. BOWEN, of Philadelphia,in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Wrenches, of which the following is a full, clear, and exact description.

This invention relates to a novel construction and arrangement of the two jaws and of thehandle-bar in connection therewith, so that the jaws can be adjusted in relation to each other, and then thejaws given a movement toward eachother by a swing of the handle-bar in the use of the wrench. This I accomplish in the manner hereinafter described and claimed, and illustrated in the accompanying drawings, in wh'ich Figure l is a side view of a wrench constructed according to this invention. Fig. 2 isa longitudinal vertical section of Fig.1; Fig. 3, a cross-section on line 3 3, Fig. 1; Fig. 4, a cross-section on line 4 4, Fig. l. I

In the drawings, A and B represent respectively the outer and the inner jaws of a wrench. The outerjaw, A, by its arm U, is hinged to one end of the handle-bar D, and the inner jaw, B, is arranged to be slid forward and backward upon a bar, E, and to be set by a thumb or set screw, F, entering one side of the jaw and bearing against the serrated surface G of the bar, to the better fasten thejaw in position. The bar E passes loosely through. the inner jaw, B, and enters a socket, a, of the outer jaw, and at its front end, I), which is offset, it is pivoted to one end of a link, H, which is pivoted at its other end to the handlebar D at d. The innerjaw can be adjusted and placed and set at aily desireddistance, within given ables the wrench in use to be released from its grip upon an article or made to tightly-grip the same by a simple movement or swing of the handle-bar upon its hingein the usual wellknown manner of using wrenches.

K is a set-screw for an abutment to the inner end, g, of the handle-bar, and by suitably adjusting the same it is plain the swing of the handle-bar, and thus the movement of the inner jaw, B, to and from the outer jaw, A, carried thereby, can be regulated.

The set-screw F screws onto a rigid projection of jaw B, through which is arranged to loosely slide a pawl, M, its inner end being adapted to fit in the teeth of the rack-bar E, and its outer end having a peripheral groove, h, in which a pin, 1, of screw-nut F plays, so that by turning the screw-nut in one direction the pawl will be moved from the said rack to allow the jaw B to be moved on the bar E to adjust it in the desired position, and in the other direction to firmly set the jaw in such position. The adjustment of the inner jaw upon its bar can be arranged in other ways than as shown, as is obvious.

Having thus described my invention, whatI claim, and desire to secure by Letters Patent, 1s

1. A wrench composed of an inner jaw, B, adjustable upon a bar, E, and of an outer jaw, A, hinged to ahandle-bar, D, that is connected by a link, H, to the bar E of the movingjaw, substantially as and for the purpose specified.

,2. The combination of the inner and outer jaws, a handle pivoted to the outer jaw, and having a portion which projects beyond such pivotal attachment, a connection between the handle and the inner jaw, and a set-screw passing through a fixed part of the outerjaw, and having its inner end arranged to form an abutment for the said outward projection of the handle, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing wit- HBSSGS.

J. HOWARD BOWEN.

Witnesses:

EDWIN W. BROWN, WM. S. BELLOWS. 

